curl https://openrouter.ai/api/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer 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" \
  -d '{
  "model": "deepseek/deepseek-r1:free",
  "stream": true,
  "messages": [
    {
      "role": "user",
      "content": "你好"
    }
  ]
  
}'